diff --git a/src/base4.rs b/src/base4.rs
index 8230c65..cddd51b 100644
--- a/src/base4.rs
+++ b/src/base4.rs
@@ -1,5 +1,3 @@
-use std::ops::Deref;
-
 use crate::core;
 
 pub fn alphabet() -> Vec<String> {